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A skater of mass 73.0 kg initially moves in a straight line at a speed of 4.90 m/s. The skater approaches a child of mass 38.0 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?
A block and a gun are firmly affixed to opposite ends of a long glider mounted on a frictionless air track. find the mass of the gun-glider-block system
A point charge Q = 8.50×10-6 C is at the center of a conducting spherical shell of radius R = 17.90 cm. What is the field just outside the shell
A device known as Atwood\'s machine consists of two masses hanging from the ends of a vertical rope that passes over a pulley, calculate the magnitude of their acceleration, a, and the tension in the rope, T
Two point charges lie on the x axis. A charge of +9.5 µC is at the origin, and a charge of -9.5 µC is at x = 10.0 cm, What is the net electric field at x = -4.0 cm
A dog running in an open field has components of velocity = 3.4 and = -1.9 at time = 10.4. For the time interval from = 10.9 to = 24.7, the average acceleration of the dog has magnitude 0.45 and direction 25.
A locomotive accelerates a 25-car train along a level track. Every car has a mass of 7.6 ? 104 kg, What is the tension in the coupling between the first car and the locomotive
How fast will the automobile be traveling at that instant.
A flat cylindrical grinding wheel is spinning at 2000 rpm (clockwise when viewed head-on) when its power is suddenly turned off. Normally, How much work was done by friction on the system
A 3 kg block initially traveling at 5 m/s collides with a 1 kg block (initially at rest) sitting near the base of a hill. how high up the hill do the two blocks slide after the collision
Multiple-Concept Example 6 provides a review of the concepts that play roles here. What are the input heat and rejected heat
A runner is running the first heat of a100 m race at a velocity of 6.9 m/s in an easterly direction. What is the relative velocity of the runner to the wind
A 2000w air conditioner and 700w refrigerator each operate on 120V rms. find current through air conditioner
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